<!DOCTYPE html>
<script src="../../resources/testharness.js"></script>
<script src="../../resources/testharnessreport.js"></script>
<style>@media{}</style>
<style>@media{}</style>
<script>
    test(() => {
        var sheet = document.styleSheets[0];
        sheet.ownerNode.remove();
        sheet.insertRule("div{}", 0);
    }, "Inserting a rule in a detached sheet with @media should not cause an assert/crash.");
</script>
